8f26d181c3
Everything works fine without USB being plugged in but faults (I think) when USB is plugged in. This is switched away from the USB code from the bootloader onto the USB code thats generated by Atmel Studio using the high level classes from ASF.
124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/**
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* \file
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*
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* \brief ARM functions for busy-wait delay loops
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*
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* Copyright (c) 2013-2015 Atmel Corporation. All rights reserved.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of Atmel may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* 4. This software may only be redistributed and used in connection with an
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* Atmel microcontroller product.
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*
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* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* \asf_license_stop
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*
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*/
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/*
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* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
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*/
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#ifndef CYCLE_COUNTER_H_INCLUDED
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#define CYCLE_COUNTER_H_INCLUDED
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#include <compiler.h>
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#include <clock.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @def F_CPU
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* @brief MCU Clock Frequency (Hertz)
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*/
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#ifndef F_CPU
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# define F_CPU system_gclk_gen_get_hz(0)
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#endif
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/**
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* @name Convenience functions for busy-wait delay loops
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*
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* @def delay_cycles
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* @brief Delay program execution for a specified number of CPU cycles.
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* @param n number of CPU cycles to wait
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*
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* @def cpu_delay_ms
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* @brief Delay program execution for a specified number of milliseconds.
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* @param delay number of milliseconds to wait
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* @param f_cpu CPU frequency in Hertz
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*
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* @def cpu_delay_us
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* @brief Delay program execution for a specified number of microseconds.
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* @param delay number of microseconds to wait
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* @param f_cpu CPU frequency in Hertz
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*
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* @def cpu_ms_2_cy
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* @brief Convert milli-seconds into CPU cycles.
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* @param ms number of milliseconds
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* @param f_cpu CPU frequency in Hertz
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* @return the converted number of CPU cycles
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*
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* @def cpu_us_2_cy
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* @brief Convert micro-seconds into CPU cycles.
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* @param ms number of microseconds
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* @param f_cpu CPU frequency in Hertz
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* @return the converted number of CPU cycles
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*
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* @{
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*/
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/**
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* \brief Delay loop to delay n number of cycles
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*
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* \note The function runs in internal RAM so that flash wait states
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* will not affect the delay time.
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*
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* \param n Number of cycles
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*/
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void portable_delay_cycles(unsigned long n);
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#define cpu_ms_2_cy(ms, f_cpu) \
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(((uint64_t)(ms) * (f_cpu) + (uint64_t)(7e3-1ul)) / (uint64_t)7e3)
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#define cpu_us_2_cy(us, f_cpu) \
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(((uint64_t)(us) * (f_cpu) + (uint64_t)(7e6-1ul)) / (uint64_t)7e6)
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#define delay_cycles portable_delay_cycles
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#define cpu_delay_s(delay) delay_cycles(cpu_ms_2_cy(1000 * delay, F_CPU))
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#define cpu_delay_ms(delay) delay_cycles(cpu_ms_2_cy(delay, F_CPU))
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#define cpu_delay_us(delay) delay_cycles(cpu_us_2_cy(delay, F_CPU))
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//! @}
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#ifdef __cplusplus
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}
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#endif
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#endif /* CYCLE_COUNTER_H_INCLUDED */
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